encode the Lakh dataset Fail

[ivychill]

I have converted Lakh MIDI Dataset into NoteSequences with convert_dir_to_note_sequences successfully.
Then I tried to encode the Lakh dataset with MusicVAE, use scripts/generate_song_data_beam.py, but I always get prompt "TypeError: PTransform Create: Refusing to treat string as an iterable. (string='../notesequences_tfrecord')"
I have checked python package version carefully to ensure that it is the same as requirement.txt, but the problem remained.

[MatthewChau99]

I got the same problem. I solved it by making this change to scripts/generate_song_data_beam.py:106

p |= 'tfrecord_list' >> beam.Create(FLAGS.input)

to

p |= 'tfrecord_list' >> beam.Create([FLAGS.input])